Waterproof cement



106. couPo'smous" 9 8 ml Q PL A S TlQ 6 erties,

UNITED STATES ml? s- 33L Q FI S I K OBro mamm l;

PRECIPITATION cour a'm r, or nos Anaem a, curl-cam, a eonrggmmg o warmnoor cnmm'r ennui-0am Ho Drawing.

This invention relates to the production of Portland cement and particularly a hydraulic cement orconcrete made therefrom which will have certain advantageous, propplarticularly a g 'gater degree of H ticity t an is present in ordinary Part and cement concrete or plaster and also a greater resistance to adsorption of water or passage of water therethrough.

1 10 I have discovered that a composition containing diatomaceous earth or infusorial earth with bituminous, oily or hydro-carbon 'material may beused advantageously as an "addition to Portland cement for the purpose b 14Lv of j rendering a therefrom more plastic and more water- 7. qproof.

.i :The I 'may com rise or consist of a naturally oo- 1 curring iatomaceous or infusorial earth or i shale consisting mainly of diatom'i-te or simthe concrete or plaster made composition used'in my invention ilar material together .with bituminous matter or oily matter. Sucha diatomaceous shale is found for example at or near Casmalia, California, and has approximately the follow composition:

v 7 Per cent.

Loss on ignition 27.67 Silica 53.75

Iron oxide and alumina 14.45

Calcium oxide 0.99 Magnesium oxide 1.17 v In addition to'diatomite and bituminous material the composition may mclude' more as or less clay or argillaoeous material occur-.

40 thereto. I

gm kgrand cemen of t e lisfirrfieenea for Portland ring for example naturally with the diato maceous earth and may also include more or esia either occurring natless lime or ma 'atomaceous earth or added urally with the As an example of one method of manufact'ure of the improved composition a'naturally occurring. oil bearin or bituminous diatomaceous eartE of a proximately the composition aEve set fort may reduced by crushing and grinding to a suitable state of'division for example one fourth inch mesh or finer, and then added to cement ound therewith to pr. uce

cement. Or the oil bearing diatomaceous earth or-diatomaceoua shale may be, groan Application field February 28, 1924, Serial K0. 885,280..

las- 1 in the up v mesli or i","" a id then mixed with the ground Portland, cemlefitrf 'The amount of plas'ticizingcomposition,

added; to the fortland cement clinker orflt'o ,{use one part of the water-proofing and plasticizing material to tento twentyparts,

'of Portland cement clinker or of Portland cement as the case may be. In connection with the compositionabove described I may add any other suitable constituents either by way of dilution or forthepi rpose of modifying the effect of the compos tion-m i any way, forexamfile, for modifyinf either. the drying, or the prima 01 0111591.. i fi fl The term diatomaceous earth as herein mjte so-called, but any diatomaceous 'or infusorial earth containing or including asfja mai'or constituent diatomaceous' or infusoria material irrespective of the presenceof other constituentssuch as shale, limestone,'

a fs wp v ied that the-a va 'descri e d ingredients are used ins'uflicient 1 proport ons to produce substantially the' J same effectas the stated composition.

.used is intended to include not only' diato-' I l magnesia etc occurring ,llatln'all 'with'.th6 I diatcmaceous or infusorial mater al oradjd ed thereto, provided that the materialis essentially of diatnmac'eous nature, that is to spy; consists jmainly of diatomace'ous" cart The modifyingagent used for retardintg or controlling the drying of the water-P17 0 ing com osition of the cement made there with or or retarding or controllin thejsetting of the cement may consisto or coinprise chloride, fluor de, sul hate, sili'cateor fluos I ma esium ca'Io1um,-or

an such agent ma one hundred parts of the mixture of diatomaceous earth and bituminous or oily material. r I

What I claim is: 1. A composition com one to tenparts o the modifymgagent per a v rising Portland co ment and a waterproo ng material in the d proportion of 1 part of waterproofingmaterial to 101:0 20 parts Portland cement, ment and a waterproofing material intersaid waterproofing material including diatoground therewith m the proportion of 1 maceous earth and hydrocarbon naturally art waterproofing material to 10 to 20 parts occurring therewith. 1 1 of Portland cement, said water roofing ma- 5 2. A composition comprising Portland ce-- terial consisting of oil-bearing ment and a waterproofing material in the earth. proportion of 1 part waterproofing material to 10 to 20 parts Portland cement, said waterproofing ,material consisting of oilbearing diatomaceous material.

3. A composltion comprising Portland ce- 'In testimony whereof I have hereunto subscribed my name this 20th day of February 1924.

HARRY v. WELCH.

atomaceous 

